Home / 15,015.60-20,721.42-8,301.24

Finding the Fourth Proportional to 15,015.60, 20,721.42 and 8,301.24

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Solution

The fourth proportional to 15,015.60, 20,721.42 and 8,301.24 is: 11,455.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,015.60 : 20,721.42 = 8,301.24 : x
  2. Step 2: Convert to fraction form
    15,015.60/20,721.42 = 8,301.24/x
  3. Step 3: Cross multiply
    15,015.60x = 20,721.42 × 8,301.24
  4. Step 4: Simplify right side
    15,015.60x = 172,013,480.56
  5. Step 5: Solve for x
    x = 172,013,480.56/15,015.60
  6. Step 6: Final answer
    x = 11,455.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.